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nouveau_prime.c revision 1.1.1.3 
      1 /*	$NetBSD: nouveau_prime.c,v 1.1.1.3 2018/08/27 01:34:55 riastradh Exp $	*/
      2 
      3 /*
      4  * Copyright 2011 Red Hat Inc.
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a
      7  * copy of this software and associated documentation files (the "Software"),
      8  * to deal in the Software without restriction, including without limitation
      9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
     10  * and/or sell copies of the Software, and to permit persons to whom the
     11  * Software is furnished to do so, subject to the following conditions:
     12  *
     13  * The above copyright notice and this permission notice shall be included in
     14  * all copies or substantial portions of the Software.
     15  *
     16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     19  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
     20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
     21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     22  * OTHER DEALINGS IN THE SOFTWARE.
     23  *
     24  * Authors: Dave Airlie
     25  */
     26 
     27 #include <sys/cdefs.h>
     28 __KERNEL_RCSID(0, "$NetBSD: nouveau_prime.c,v 1.1.1.3 2018/08/27 01:34:55 riastradh Exp $");
     29 
     30 #include <drm/drmP.h>
     31 #include <linux/dma-buf.h>
     32 
     33 #include "nouveau_drm.h"
     34 #include "nouveau_gem.h"
     35 
     36 struct sg_table *nouveau_gem_prime_get_sg_table(struct drm_gem_object *obj)
     37 {
     38 	struct nouveau_bo *nvbo = nouveau_gem_object(obj);
     39 	int npages = nvbo->bo.num_pages;
     40 
     41 	return drm_prime_pages_to_sg(nvbo->bo.ttm->pages, npages);
     42 }
     43 
     44 void *nouveau_gem_prime_vmap(struct drm_gem_object *obj)
     45 {
     46 	struct nouveau_bo *nvbo = nouveau_gem_object(obj);
     47 	int ret;
     48 
     49 	ret = ttm_bo_kmap(&nvbo->bo, 0, nvbo->bo.num_pages,
     50 			  &nvbo->dma_buf_vmap);
     51 	if (ret)
     52 		return ERR_PTR(ret);
     53 
     54 	return nvbo->dma_buf_vmap.virtual;
     55 }
     56 
     57 void nouveau_gem_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
     58 {
     59 	struct nouveau_bo *nvbo = nouveau_gem_object(obj);
     60 
     61 	ttm_bo_kunmap(&nvbo->dma_buf_vmap);
     62 }
     63 
     64 struct drm_gem_object *nouveau_gem_prime_import_sg_table(struct drm_device *dev,
     65 							 struct dma_buf_attachment *attach,
     66 							 struct sg_table *sg)
     67 {
     68 	struct nouveau_bo *nvbo;
     69 	struct reservation_object *robj = attach->dmabuf->resv;
     70 	u32 flags = 0;
     71 	int ret;
     72 
     73 	flags = TTM_PL_FLAG_TT;
     74 
     75 	ww_mutex_lock(&robj->lock, NULL);
     76 	ret = nouveau_bo_new(dev, attach->dmabuf->size, 0, flags, 0, 0,
     77 			     sg, robj, &nvbo);
     78 	ww_mutex_unlock(&robj->lock);
     79 	if (ret)
     80 		return ERR_PTR(ret);
     81 
     82 	nvbo->valid_domains = NOUVEAU_GEM_DOMAIN_GART;
     83 
     84 	/* Initialize the embedded gem-object. We return a single gem-reference
     85 	 * to the caller, instead of a normal nouveau_bo ttm reference. */
     86 	ret = drm_gem_object_init(dev, &nvbo->gem, nvbo->bo.mem.size);
     87 	if (ret) {
     88 		nouveau_bo_ref(NULL, &nvbo);
     89 		return ERR_PTR(-ENOMEM);
     90 	}
     91 
     92 	return &nvbo->gem;
     93 }
     94 
     95 int nouveau_gem_prime_pin(struct drm_gem_object *obj)
     96 {
     97 	struct nouveau_bo *nvbo = nouveau_gem_object(obj);
     98 	int ret;
     99 
    100 	/* pin buffer into GTT */
    101 	ret = nouveau_bo_pin(nvbo, TTM_PL_FLAG_TT, false);
    102 	if (ret)
    103 		return -EINVAL;
    104 
    105 	return 0;
    106 }
    107 
    108 void nouveau_gem_prime_unpin(struct drm_gem_object *obj)
    109 {
    110 	struct nouveau_bo *nvbo = nouveau_gem_object(obj);
    111 
    112 	nouveau_bo_unpin(nvbo);
    113 }
    114 
    115 struct reservation_object *nouveau_gem_prime_res_obj(struct drm_gem_object *obj)
    116 {
    117 	struct nouveau_bo *nvbo = nouveau_gem_object(obj);
    118 
    119 	return nvbo->bo.resv;
    120 }
    121